Stefan Rieben / Grey-headed Woodpecker (Picus canus) parents feeding chicks at nest hole, Zurich, Switzerland

Nate Chappell/ BIA / Grey-headed Woodpecker (Picus canus) female foraging, Nam Nao National Park, Thailand

Volker Hesse / Grey-headed Woodpecker (Picus canus) male, Lower Saxony, Germany

Rosl Roessner / Grey-headed Woodpecker (Picus canus) male, Rhineland-Palatinate, Germany

Bob Steele / Grey-headed Woodpecker (Picus canus), Kaeng Krachan, Thailand

Martin Willis / Cardinal Woodpecker (Dendropicos fuscescens) foraging on a tree trunk, Kruger National Park, South Africa

Konrad Wothe / Grey-headed Woodpecker (Picus canus) at nest cavity, Bavaria, Germany

Duncan Usher / Grey-headed Woodpecker (Picus canus) male, Germany

Duncan Usher / Grey-headed Woodpecker (Picus canus) male, Germany

Duncan Usher / Grey-headed Woodpecker (Picus canus) on tree trunk, Europe

Duncan Usher / Grey-headed Woodpecker (Picus canus) on tree trunk, Europe

Duncan Usher / Grey-headed Woodpecker (Picus canus) on grassy field, Europe